body {
  margin: 0;
  padding: 0;
  background-color: #25292d;
  position: relative;
  width: 100%;
  height: 100%;
}
body header {
  margin: 0;
  height: 73px;
  width: 100%;
  position: relative;
  border-bottom: 1px solid #666;
}
body header a {
  display: block;
}
body header a:nth-child(1) {
  margin: 9px 20px;
}
body header a:nth-child(2) {
  position: absolute;
  margin: 0 auto;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
}
body nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
  width: 100%;
  height: 78px;
  line-height: 78px;
}
body nav ul li {
  float: left;
  width: 25%;
  text-align: center;
}
body nav ul li a {
  display: block;
  text-decoration: none;
  font: 400 25px;
  color: #666;
  margin: 0 30px;
}
body nav ul li a:hover {
  color: #fff;
  border-bottom: 3px solid #9579db;
}
body nav ul li .active {
  color: #fff;
  border-bottom: 3px solid #9579db;
}
body nav ul::after {
  content: "";
  clear: both;
}
body .main {
  margin-top: 3px;
  width: 100%;
  background-color: #1e2125;
  padding-bottom: 90px;
}
body .main .main-header {
  height: 108px;
  line-height: 108px;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: nowrap;
}
body .main .main-header .main-h-l {
  position: relative;
}
body .main .main-header .main-h-l .circle {
  display: inline-block;
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 60px;
  height: 60px;
  background-color: #25292d;
  border-radius: 50%;
}
body .main .main-header .main-h-l .circle img {
  width: 60px;
  height: 60px;
  border-radius: 50%;
}
body .main .main-header .main-h-l span {
  padding-left: 62px;
  font-weight: 500;
  font-size: 20px;
  color: #fff;
}
body .main .main-header .main-h-l::after {
  content: "";
  clear: both;
}
body .main .main-header .main-h-r {
  position: relative;
}
body .main .main-header .main-h-r span {
  color: #666;
  font-size: 15px;
  padding-right: 122px;
}
body .main .main-header .main-h-r img {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
}
body .main .main-header .main-h-r::after {
  content: "";
  clear: both;
}
body .main .main-body .main-b-item {
  height: 580px;
  background: url(../images/main_1.jpg) no-repeat;
  background-size: cover;
  text-align: center;
  color: #fff;
}
body .main .main-body .main-b-item h1 {
  margin: 0;
  padding: 0;
  padding-top: 250px;
}
body .main .main-body .main-b-item .button {
  margin: 0 auto;
  background-color: #323241;
  width: 200px;
  height: 60px;
  border-radius: 30px;
  text-align: center;
  line-height: 60px;
  font-size: 20px;
}
body .main .main-body .main-b-item .button:hover {
  background-color: #fff;
  color: #000;
}
body .main .main-body .main-b-item:nth-of-type(2) {
  background: url(../images/main_2.jpg) no-repeat;
  background-size: cover;
}
body .main .main-body .main-b-item:nth-of-type(3) {
  background: url(../images/main_3.jpg) no-repeat;
  background-size: cover;
}
body .main .main-body .main-b-item:nth-of-type(4) {
  background: url(../images/main_4.jpg) no-repeat;
  background-size: cover;
}
body footer {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 90px;
  line-height: 90px;
  background-color: #25292d;
}
body footer ul {
  width: 100%;
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  justify-content: space-between;
  flex-wrap: nowrap;
  text-align: center;
}
body footer ul li {
  width: 20%;
}
body footer ul li a {
  display: inline-block;
}
body footer ul li:hover {
  background-color: #202428;
}
body footer ul li:nth-child(1) {
  background-color: #202428;
}
body .motai {
  display: none;
  position: absolute;
  margin-top: -10px;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(137, 161, 137, 0.5);
}
body .motai .motai-context {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 300px;
  height: 300px;
  background-color: #1a0a0a;
  text-align: center;
  color: #f00;
  border-radius: 30px;
}
body .motai .motai-context p {
  font-size: 2em;
  padding-top: 50px;
}
body .motai .motai-context button {
  display: block;
  margin: 0 auto;
  width: 50px;
  height: 40px;
  border-radius: 10px;
  background-color: #00f;
  color: #fff;
  outline: none;
  border: 0;
  font-size: 15px;
}
